Apparatus for inspecting plate glass



Nnv, 4 1924. 1,514,386

r H. F.HITNER APPARATUS Fon asPEcTING PLATE GLASS' Filed' March 27,.. 1924 15 sheets-sheen 1 wm/Ww T m.m\ wy .mm E J Illllwlil .1 IHN', l u duw/wflrlun t l l Immun. lul, |\||u,||4.|| r\\f, xXt/,r S/ `X12, L ,r/ f .l m. f x J f f. ,l Q .f\ .Q J #Q In. 1 1 1` llrllwlrllwmlyllllIIMZVIIIIII|HIP|||I|:b I mlfwwnflxwlh. lvlunllalllv Om .||H||||||....|. HHWHMFJ r .Hunnuf \1 331i H 1 Il m T.f.|| l L |I In. L| d .1| f 1 l s n ..|,1| .||||||1| n .lwlnlidl J u i n n m v u n n v 1,514,386 H. F. HITNER APPARATUS FOR NSPECTING PLATE GLASS Filed March gv. 1924 3 Sheets-sheer- 2 Nov. 4 1924.

:slIIHIIAi l l I l IUIIIL Nom 4 19224- H. F. HITNER APPARATUS FOR INSPECTING PLATE GLASS 5 shets-sheem AFiled March $27 1924 l//I/I'y.

/N VEN 70x? QW rammed Nev.4,1924.

I and'A State of Pennsylvania, -have made a 7 newl and useful invention in -Improvements in an vApr aratus for Inspecting Plate Glass, of w ichthe -following is a specification.

. '10. The invention relates to apparatus forl inlspecting plate glass as it'is formed and an'- nealed in acontiuousprocess, such as that (disclosed in "the `'Grelstharp application, "SerialNumber 656,441., Insuch an'operapassing throng mtosections o 44suitable length as. it emers 'from theleer .and laced 1n storage 'rac .The present invention relates to the means 2 employedlfor inspttin the glass, so that the defects may be noted and marked (with chalk) vpreliminaryfto cutting off the seo- -tionsinsuch la wa. as to eliminate parts containing defects, gud as .a guide in sort- Iing the sections after they are cut olf. The' .invention has for'its rincipal objects the provision of improved).'means for illuminating'the `glass `and facilitating the work ofthe inspector, who occupies a.. positlon abovefthe lass and ordinarily sta/nds upon the sheet a ove the area of illumination in' performing his duties. p One embodiment of the invention is illustrated in the accompanyin'g drawings wherein:

Figure 1 is a p arti-al plan view'of the apparatus. Fius a side elevation, partially, insection. And Figs.`4 and 5 are detail sections, Fig.A

. 4 being taken ol'the'lin'e IV-IV of Fig. 1,

. and'Fig. 5being taken longitudinally vof one 'of the table rollers opposite to the ends shown 'in Fig. 1.

The table for receiving the glass is located at the outlet end of th` leer upon a substructure comprising longitudinally4 extending members 1 and transverse members',o f the sheet.v T is illumination necessarily 2'a`s indicated in Fig. 3, a sufficient space be- .ing preferably provided between the .leer andthe table so that the glass is cooled t0 le such an extent that the operator can .stand with comfort upon the glass sheet 3 assing Aover the table` The table preferably consists of a plurality of rolls 4 mounted upon spaced bearings 5 carried by the longitudi- 6l nally extending channels 6, the latter being sEsT AVAsLAeLE COPY ofA the `rolls remote ig. 3 is a transverse section.

*UNITEDSTATESI"APATNT-GFFLGR nAnaY 1i'. hinten, or mmsnURGmTENNsYLYANIA, AssGon. 'ro'v'r'rrsninefrr HATE emsscoxrmr, A conromi'rrou or PENNSYLVANIA. mnm'rusro'n INsPEcrmG rnATE GLASS.

- aipumion. mea mmh a?, 1924..4 serian m$.'=,7oz,25a.4

carried by the substructure heretofore referred to. The-.rollers preferably consist o'f cylinders 7 (Fig'. v5) carried uponfshafts 8, the latter being connected to the lcylinders by .means of the blocks9 at each end, 60 Roller bearingslO are'preferably'employed and 'at one end' of the shafts zjsprockets 11 are employed by means'of which the rollers are turned. These s rockets aii at the ends om the ends Shown in Fisl'and3. 7 5 ntermediate tlie rollers 4 as indicatedin Fig. 2, are a series of trans'yeme' I' beams 12 supported upon the channels f6 -and having 15 tion, the continuous-'sheet orl ribbon, after..

h an annealing leeris ,cutf

their upper sides ingontact with o r closely 79 adjacentto thesurface of the glass. These means serveto guard the operator, who is standing. or kneeling upon the sheet, 'from .injury-in case the glass lshould break, and," they tend to prevent breakage due to the/7.?

Weight of the operator, although the glass is suiiciently strong to normally support the weight of the operator with the rollers spaced as shown.

. By reference to "3, it will beJ/ioted 80 that the len hof .the-rollers 4 is less *han the width o y.the sheet 3, so thatt'ie '.ges project out past the end of the rolls. This is to give opportunity for 'the aplication of. ,the illuminatin devices 'providid along the .85 sides of thefts eet.- The illuminating devices consist' of a plurality. of incandescent lights. 13 mounted in the/reflectors 14 and carried fby the compartments "'15,

bcompartments are'pre'ferably oz/aplroximate rectangular cross' section (Fig. 3 and are maderof 'sheet metal., The lamps 13 are carried in suitable sockets,. /Iti Amounted inthev top walls ofthe compartments and serv'- ing also to .spport the' reflectors.- The re- 95 I lectors are so designed esto'project as much light as ...possible laterally ,into the edges /f thesheetr and an' illumination of the sheet, suiiicient for very. accurate in spection,I is thus rovided clear to the center decreases in intensity from the edge ofwthe sheet to the 'center,- but "as applied lhas been found sufficient forthepro Ir'inspection of a sheet whichisI 72'. in Width.V ',165

In order that there' mayf-be no interference by reason of the li 'h't projected from the refiectors above an below the glass sheet, the curtains or shieldsl' and 18 are,. 'f

provided. The shield 17 is ofvided with metal strips 19 for weighting it :it its loweincdgc and is rcleasably secured.

Y to the top wall of the compartment as inserving by its wciglitto hold the curtain in position. The lower shield 18 is of sheet^ dicaterl in Fig. 3. A. longitudinal groove or recess adjacent the edge of the top wall of the compartment is provided over which.

the upper edge oithe curtain 417 is stretched and a solid lmetal rod 20 is then applied,

metal provided at itsuppcr edge with an angle 21 which citlicrutouchcsv or is 'very closely adjacent the lower surface of 'the glass sheet.

Asa matter of convenience, the compart-l ments 15 are vmounted sothat they may be i 30, compartments arc placed 'beneath the floor moved toward and from the table. T his serves the purpose of adjustment to position the light aiidrellector to thebcst advantage for illumination, and gives access to the -24 se that the compartments may be veryeasily moved in and out and 'adiusted The 25 (Fig. 3) and access is given to the parts beneath by means of the hinged doors 'Q6 fas which rest on the beams 24 when in closed position. ,V In operation, the glass-*movies slowlyover the table and the inspector stands or kneels on the glass and marks with chalk the deects which he observes in the sheet beneath, such as, bubbles, ream and the like. 4 He may alsol eriorm the duty of cutting thesheet. The engths into which the continuous sheet is cut would ordinarily be uniform, but when defects of a certain character are found upon the sheet, it may he desirable for the inspector to cut out a strip containing the defect. The lamps along the edges of the sheetin connectionwilth the reflectors give an illumination through the sheet which meets the requirements for inspection,

this effect beingY augmented by the use ofthe shields 17 and 18, particularly, the shield 17, which is practically an essential. The

'table is also enclosed in :fdarliened com# Ipartment which still further assists in makf ing the illumination of the sheet effective for; inspection. purposes. Means are pro` vidfed for causing the compartments' 15 td move outward (away from.the center line of,the sheet) when the glass sheetwiden's out or shifts bodily' to one side. This meaiis comprises the grooved rollers 27 (Fig. carried by the levers28 and the cables '29 passing around pulleys 30 and 31 and connected to the rear sides of the compartments as indicated at 32. The arms 28 lare mounted on` brackets 33 carried by the I beams 24 the pulleysO also being carriedby "brackets secured' to such I beams, while the pulleys 31 are carried by bolts 34 extending' throughtl'ic angle irons 35. The latter is secured at its ends tothe I beams 24. ,1, After the compartments have once been moved BEST AVAiLAeLE cosi outward troni vtheir normal positions by the sheet of glass, :he: are moved back to such posit-ion 'by the operator, who is in vposition with the edges of the sheet.

iVhat I claim is:

"I5 to .observe wlietlicr'tlie rollers 27 contact l 1. Apparatusfor inspecting a contixiu-r u ously rforined forwardly moving sheet or ribbon' of glass,'comp1'i s1nga table over which the glass passes of less width vthan that of the sheets so thatthe edges. of the s'licet project out. past th'efsides of the table, a shielding compartmentextending along each side of the table and 'each having a slot in its side through which the edge of the sheet projects, and illuminating means in the compartments adapted to proect light laterally th rough tlie'edgcs osaid sheet.`

2. Apparatus for inspecting a continuously formed forwardly moving sheet 0r ribben' of glass, comprising a, table lover which i'he glass 'passes of less width than that of the sheet, so thatithe edges of the sheet project out past the sides of tlie table,

ashieldipgg; compartment,extending 'along 'I cach sidcll of tbc'table Vand each havingA a slot-1in its side through which the edge of theshcet \projects, and illuminating means in the compartments adapted to project lighxf laterally'thiough the edges of said sheet, the said compartments being mounted 'i for iiiqvcnlent toward and from the table.

B. Apparatus forfinspecting 'a continuously formed forward-ly moving sheet or ribbon 'of lglass, comprising a table over which .the glasspasses of less vwidth than .that of the sheet, iso that the edges of the sheet project out past the sides ofthe table,

each side of the table and alsocxtending upA above t e level of the tabie into'which the edge'of Athe sheet 4projects,l a shield occur- 15' bon of glass, comprising a table? -over' which the :glass passes of less width than that of the sheet, so that the edges of the sheetprojcct out past'vthe sides of the table,

a shielding compartment extending along each side of the table, and also extending up above theilevelof the table into Awhich the edge jof the sheet projects, and lying a shieli'lingr compartment extending along-' face of the glass, a shield closing the sideof each compartment .below the glassand ex' ltending up to the 'lower surfaceof vtlie glass sheet and illuminating means in the compartments adapted to project light, laterally through the edges of said sheet. 5. Apparatus for inspecting a continuously forme-d forwardly moving sheet or' ribbon of glass, comprising a table over which the glass passes, means for projecting light laterally into the edges of the sheet, and a curtain at each side of the table extending upward from the surface of the sheet.

6. Apparatus for inspectingr a continuously formed forwardly movingy sheet or ribbon of glass, comprising a vtable over which the glass passes, consisting of a plurality of spaced rollers, means for projecting light laterally into the edges of the sheet,

and Asupporting members in the `spaces between theA rollers and extending transversely of the table beneath the glass sheet.

7. Apparatus for inspecting a continuously forwardly moving sheet or ribbon of glass, comprising a table `over which the glass passes'of less width than the sheet so that the edgesl of the sheet project ont past the sides of the table, afshielding compartment extending along each side of 'the table mounted for movement toward ,and from the longitudinal center line of the table and each having a slot in its side through which the edge of the sheet projects, illuminating means in the compartments adapted to project light laterally through the edges of the -sheet, and means co-acting between the edge of the sheet and the compartments to regulate the position of the compartments.

In testimony whereof, I have hereunto subscribed my .name this 24th day of March, 1924.

A HARRY F. HITNER. 

